Information checking apparatus for data transfer system





11. IN A HIGH SPEED PRINTING SYSTEM INCLUDING PRINTING APPARATUS, INFORMATION STORAGE MEANS FOR SIMULTANEOUSLY STORING FIRST AND SECOND QUANTITIES OF DATA, DATA INPUT MEANS INCLUDING A RECORDING MEDIUM MOVING IN A GIVEN DIRECTION FOR TRANSMITTING QUANTITIES OF DATA FROM SAID RECORDING MEDIUM TO SAID INFORMATION STORAGE MEANS, CONTROLLABLE TRANSFER MEANS FOR TRANSMITTING QUANTITIES OF DATA FROM SAID INFORMATION STORAGE MEANS TO SAID PRINTING APPARATUS WHEREBY SAID DATA IS PRINTED OUT, CHECKING MEANS FOR CHECKING EACH QUANTITY OF DATA TRANSMITTED BY SAID DATA INPUT MEANS FOR ERRORS AND FOR PRODUCING AN ERROR SIGNAL UPON DETECTION OF AN ERROR IN ONE OF SAID QUANTITIES, MEANS FOR APPLYING EACH QUANTITY OF DATA TO SAID CHECKING MEANS, CONTROL MEANS RESPONSIVE TO AN ERROR SIGNAL FROM SAID CHECKING MEANS INDICATING AN ERROR IN SAID SECOND QUANTITY OF DATA INCLUDING FIRST MEANS FOR DISABLING SAID TRANSFER MEANS, SECOND MEANS FOR STOPPING THE MOVEMENT OF SAID RECORDING MEDIUM IN SAID GIVEN DIRECTION, THIRD MEANS FOR DELETING SAID FIRST AND SAID SECOND QUANTITIES OF DATA FROM SAID INFORMATION STORAGE MEANS, FOURTH MEANS FOR IMMEDIATELY RESTORING SAID FIRST QUANTITY OF DATA TO SAID INFORMATION STORAGE MEANS, FIFTH MEANS FOR REVERSING THE DIRECTION OF MOVEMENT OF SAID RECORDING MEDIUM FOR A LENGTH OF SAID MEDIUM CONTAINING SAID SECOND QUANTITY OF DATA, SIXTH MEANS FOR INITIATING MOVEMENT OF SAID RECORDING MEDIUM IN SAID GIVEN DIRECTION TO CAUSE SAID DATA INPUT MEANS TO RE-TRANSMIT ONLY SAID SECOND QUANTITY OF DATA FROM SAID RECORDING MEDIUM TO SAID INFORMATION STORAGE MEANS, AND MEANS FOR SELECTIVELY INHIBITING SAID CONTROL MEANS WHEREBY SAID TRANSFER MEANS IS EFFECTIVE TO TRANSFER SAID FIRST AND SAID SECOND QUANTITIES OF DATA TO SAID PRINTING APPARATUS EVEN THOUGH AN ERROR OCCURS IN SAID SECOND QUANTITY. 